Thursday 25 June 2009
The largest animals ever to have walked the face of the earth may not have been as big as previously thought, reveals a paper published in ZSL's Journal of Zoology.
Scientists have discovered that the original statistical model used to calculate dinosaur mass is flawed, suggesting dinosaurs have been oversized.
Widely cited estimates for the mass of Apatosaurus louisae, one of the largest of the dinosaurs, may be double that of its actual mass (38 tonnes vs. 18 tonnes).
"Paleontologists have for 25 years used a published statistical model to estimate body weight of giant dinosaurs and other extraordinarily large animals in extinct lineages.
"By re-examining data in the original reference sample, we show that the statistical model is seriously flawed and that the giant dinosaurs probably were only about half as heavy as is generally believed" says Gary Packard from Colorado State University.
The new predictions have implications for numerous theories about the biology of dinosaurs, ranging from their energy metabolism to their food requirements and to their modes of locomotion.
More about the Journal of Zoology
Published by ZSL, the Journal of Zoology is a leading scientific journal publishing hypothesis-driven papers that advance our knowledge of animals and their systems.
For further information or to subscribe, please visit www.blackwellpublishing.com/jzo